coal mines By: Zhi Yang (Alexander) Outline Introduction - PowerPoint PPT Presentation

Dust problems in UG coal mines By: Zhi Yang (Alexander)

Outline • Introduction • Definition of coal dust • Types of coal dust • Sources of coal dust in underground coal mines • Influence of coal dust in underground coal mines • How to reduce coal mine dust

Definition of coal dust • Coal dust is a fine powdered form of coal, which is created by the crushing, grinding, or pulverizing of coal. Because of the brittle nature of coal, coal dust can be created during mining, transportation, or by mechanically handling coal.

Types of coal dust 1. Inhalable/Respirable coal dust • Can cause Coal workers' pneumoconiosis (CWP or black lung disease) 2. Flammable coal dust • Can cause explosion

Sources of coal dust generation in underground coal mines (Retrieved from: https://www.youtube.com/watch?v=QIeUtcTIXE0)

Influence of coal dust in underground coal mines (Retrieved from: (Retrieved from: https://www.youtube.com/watch?v=NNmRrQQUi9k) https://www.youtube.com/watch?v=czUUlJQ_9LE)

Coal Workers’ Pneumoconiosis (CWP)

Coal Workers’ Pneumoconiosis (CWP)

Continuous Personal Dust Monitor • Designed to operate continuously for 12 hours, and displays three values: • Respirable-dust concentration for the most recent 30-minute period, • Average Respirable-dust exposure from the beginning of the shift, and • Current percentage of the exposure limit.

Gravimetric Methods

Dust Control

Reference • B. Plush, T. Ren, K. Cram and N. Aziz, Dust Monitoring and Control Efficiency Measurement in Longwall Mining, 11th Underground Coal Operators' Conference , University of Wollongong & the Australasian Institute of Mining and Metallurgy, 2011, 231-238. • Jay F. C. and Edward D. T., 2010, Dust Control Practices for Underground Coal Mining , National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, Pittsburgh, PA. • Jay F. C., James P. R., Jeffrey M. L., John A. O. and Anita L. W., 2010, Best Practices for Dust Control in Coal Mining , Office of Mine Safety and Health Research, Pittsburgh, PA/Spokane, WA.